Table Engines

from datetime import date, datetimefrom moose_lib import OlapTable, OlapConfigfrom moose_lib.blocks import ReplacingMergeTreeEngine, SummingMergeTreeEnginefrom pydantic import BaseModel class EngineExampleRow(BaseModel):    id: str    timestamp: datetime    updated_at: datetime    deleted: int = 0    date: date    page: str    views: int    click_sum: int ## MergeTree (default, can omit engine property)MergeTree = OlapTable[EngineExampleRow]("merge_tree_table", OlapConfig(  order_by_fields=["timestamp", "id"], )); ## ReplacingMergeTree (deduplicate by key, optional version + soft delete)ReplacingMergeTree = OlapTable[EngineExampleRow]("replacing_merge_tree_table", OlapConfig(  engine=ReplacingMergeTreeEngine(),  order_by_fields=["id"],  ver="updated_at",  is_deleted="deleted",)); ## SummingMergeTree (sum numeric columns for the same key)SummingMergeTree = OlapTable[EngineExampleRow]("summing_merge_tree_table", OlapConfig(  engine=SummingMergeTreeEngine(),  order_by_fields=["date", "page"],  columns=["views", "click_sum"],));